Answer:
An electric bell is placed inside a transparent glass jar. The bell can be turned on and off using a switch on the outside of the jar. A vacuum is created inside the jar by sucking out the air. Then the bell is rung using the switch. What will we see and hear?
A.
We’ll see the bell move, but we won’t hear it ring.
B.
We won’t see the bell move, but we’ll hear it ring.
C.
We’ll see the bell move and hear it ring.
D.
We won’t see the bell move or hear it ring.
E.
We’ll see the sound waves exit the vacuum pump.
Explanation:
so, the answer to the question is
A.
We'll see the bell move, but we won’t hear it ring.
Answer:
A.
We’ll see the bell move, but we won’t hear it ring.
Explanation:
Sound waves need a medium to travel and cannot travel in vaccuum
On a nice winter day at the South Pole, the temperature rises to −54°F. What is the approximate temperature in degrees Celsius?
The approximate temperature at the South Pole is equal to -47.7 °C.
How to convert the temperature in Fahrenheit to Celsius?Fahrenheit to Celsius formula can be used to change the temperature from the scale Fahrenheit to Celsius. Both scales are utilized to determine the temperature and it offers a way to determine the object’s hotness and coldness. The symbol used to express Fahrenheit is °F. Similarly, the symbol used to represent Celsius is °C. The Celsius scale of temperature is also called centigrade scale.
Fahrenheit to Celsius formula is commonly used to convert the given temperature in Fahrenheit to Celsius.
[tex]^oC =(^oF-32)\times \frac{5}{9}[/tex]
Where F is the temperature in Fahrenheit and C is the temperature in Celsius.
Given, the temperature in Fahrenheit = -54 °F
The temperature in Celcius at the South Pole can be calculated as:
T (°C) = (-54 -32) × (5/9)
T (°C) = -47.7 °C
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This type of bike tire is thinner, lighter, more expensive, and punctures easily.
Define acceleration due to gravity
Answer:
i took a screenshot of the answer
Explanation:
Hope this helps! :)
Please help will mark brainliest
Answer:
m = 2500 [kg]
Explanation:
Newton's Second Law tells us that the sum of forces on a body is equal to the product of mass by acceleration.
∑F = m*a
where:
∑F = sum of the forces = 5.5 [kN] = 5500 [N]
a = acceleration = 2.2 [m/s²]
m = mass [kg]
Now clearing the mass [kg]
[tex]F=m*a\\m=F/a\\m = 5500/2.2\\m=2500 [kg][/tex]
A quantity that is fully described by magnitude alone is a ___________ quantity. A quantity that is fully described by both magnitude and direction is a ___________ quantity.
Answer:
Scalar quantity
Vector quantity
Explanation:
A scalar quantity is a quantity that is fully described by magnitude alone. Examples include; mass, temperature etc
A vector quantity is described by both magnitude and direction. E.g force, weight etc
two resistors of resistance 6 ohm and 3 ohm are connected in series and then in parallel .calculate the equivalent series resistance and equivalent parallel resistance.
Answer:
a. RT = 9 Ohms
b. RT = 0.5 Ohms
Explanation:
Let the two resistors be A and B.
Let RT be equivalent resistance.
Given the following data;
Resistor A = 6ohms
Resistor B = 3ohms
a. To find the equivalent series resistance;
RT = RA + RB
RT = 6 + 3
RT = 9 Ohms
b. To find the equivalent parallel resistance;
RT = 1/RA + 1/RB
Substituting into the equation, we have
RT = 1/6 + 1/3
RT = 3/6
RT = 0.5 Ohms
As here the 6 ohm and 3 ohm resistors are first connected in series and then parallel, so we can just find out the equivalent series resistance by the formula of it, which is the individual sum of all resistors (for series) and for parallel combination, the reciprocal of the total resistance is the individual reciprocal sum of all resistors, so if we apply same Formula here for series first, then we will be having :
[tex]{:\implies \quad \sf R_{s}=6+3}[/tex]
[tex]{:\implies \quad \boxed{\bf{R_{s}=9\Omega}}}[/tex]
Now, for parallel combination:
[tex]{:\implies \quad \sf \dfrac{1}{R_{p}}=\dfrac13 +\dfrac16}[/tex]
[tex]{:\implies \quad \sf \dfrac{1}{R_{p}}=\dfrac{2+1}{6}}[/tex]
[tex]{:\implies \quad \sf \dfrac{1}{R_{p}}=\dfrac36}[/tex]
[tex]{:\implies \quad \sf \dfrac{1}{R_{p}}=\dfrac12}[/tex]
[tex]{:\implies \quad \boxed{\bf{R_{p}=2\Omega}}}[/tex]
For more information related to Resistances, voltage and current, make sure to check the similar question from here :
https://brainly.com/question/27101567PLZZZZ HELP QUICK . 30 points. Emma weighs 560 N, she has decided to stay in shape so she is working out every morning, This morning she ran and lifted weight! 1. Calculate Emma's mass ( Gravity g= 9.8 N/kg). 2. If she ran 350 meters in 65 seconds, what was her velocity? 3. When she lifted weights, she exerted a 35 N to lift one of the weight 2 meters over the ground, what is the amount of work she performed? Note that units are important, so do not give any number without a unit to avoid losing points.
Force equals mass time acceleration. Weight is a force and it can replace force in the equation. The acceleration would be gravity, which is an acceleration.
1.)
Fw (weight) = m (mass) · g (gravity, 9.8 m/s²)
Fw = m * 9.81 m/s²
560N = m · 9.81 m/s²
m ≈ 57.08 kg
2.)
d = 350 meters
t = 65 seconds
velocity = d/t
velocity = 350 meters / 65 seconds
velocity ≈ 5.38 meters/sec
3.)
Force = 35N
Distance = 2 meters
Work = Force · Distance
Work = 35N · 2 meters
Work = 70 J
The monosaccharide found in fruits is
lactose
maltose
glucose
+
fructose
Help
Answer:
Fructose
Explanation:
Hope this helps!
guysss..pleaseee answer!
use calculations to explain why a person with a mass of 50kg would find it easier to jump on Earth than on Jupiter.
Answer:
Hello There!!
Explanation:
The answer is=>Because the value of gravatation on Jupiter is high in comparison with Earth and it will be hard to jump on Jupiter.
hope this helps,have a great day!!
~Pinky~
PLEASE HELP LIKE NOW ASAP PLZ! WILL GIVE BRAINLIEST
In the following measurements, which zeros are significant? Circle or highlight them.
0.100 cm
1200 kg
60.10 L
0.0007 s
Answer:
1200 kg?
Explanation:
The planet Venus has a mass of 4.87 x 10^24 kg and a radius of 6.05 x 10^6 km. What is
the magnitude of the gravitational force that an 81-kg person would experience while
standing on the surface of Venus?
(A) 179 N
(B) 719 N
(C) 259 N
(D) 7.19 x 10^8N
(E) 4.19 x 10^9N
Answer:
The gravitational force that an 81-kg person would experience while standing on the surface of Venus is approximately;
(A) 719 N
Explanation:
The question relates to gravity calculation for which we use the Newton's gravitational law which is presented as follows;
[tex]F=G \cdot \dfrac{M \cdot m}{r^{2}}[/tex]
Where;
G = The universal gravitational constant = 6.67408 × 10⁻¹¹ m³kg⁻¹s⁻²
F = The gravitational force between the two masses, "M" and "m"
r = The distance between the centers of the two masses
M = The mass of one body interacting in the gravitational force
m = The mass of the other body interacting in the gravitational force
The given parameters are;
The mass of Venus, M = 4.87 × 10²⁴ kg
The radius of the planet Venus, r (is corrected) = 6.05 × 10³ km = 6.05 × 10⁶ km
The mass of the person standing on the surface of Venus, m = 81-kg
Therefore, by plugging in the values, we get;
[tex]F=6.67408 \times 10^{-11} \cdot \dfrac{4.87 \times 10^{24} \times 81}{(6.05 \times 10^6)^{2}} = 719.2744587391571613960795027662 \ N[/tex]
From Newton's third law of motion, the gravitational force that the 81-kg person experiences while standing on the surface of Venus = F ≈ 719 N.
A race car weighs 6958 N. What is its mass?
Answer:
710kg
Explanation:
Given parameters:
Weight of race car = 6958N
Unknown:
Mass of the race car = ?
Solution:
The weight of a body is the force of gravity acting on that body. It is mathematically expressed as:
Weight = mass x acceleration due to gravity
Acceleration due to gravity = 9.8m/s²
6958 = mass x 9.8
mass = 710kg
Cart A (m = 2.0 kg) is traveling to the right at 4.0 m/s toward Cart B. Cart Y (m = 8.0 kg) is traveling to the left at 2 m/s. Which cart has the larger magnitude of momentum, and why?
Answer:
1. Cart Y has a larger magnitude of momentum.
2. Because the mass of cart Y is larger than the mass of cart A.
Explanation:
The following data were obtained from the question:
Mass of cart A (mₐ) = 2 Kg
Velocity of cart A (vₐ) = 4 m/s
Mass of cart Y (mᵧ) = 8 Kg
Velocity of cart Y (vᵧ) = 2 m/s
1. Determination of which of the cart has a larger magnitude of momentum.
For Cart A:
Mass (mₐ) = 2 Kg
Velocity (vₐ) = 4 m/s
Momentum of cart A (pₐ) =?
Momentum = mass × velocity
pₐ = mₐ × vₐ
pₐ = 2 × 4
pₐ = 8 Kgm/s
Thus, the momentum of cart A is 8 Kgm/s
For Cart Y:
Mass (mᵧ) = 8 Kg
Velocity (vᵧ) = 2 m/s
Momentum of cart Y (pᵧ) =?
Momentum = mass × velocity
pᵧ = mᵧ × vᵧ
pᵧ = 8 × 2
pᵧ = 16 Kgm/s
Thus the momentum of cart Y is 16 Kgm/s
SUMMARY:
The momentum of cart A is 8 Kgm/s
The momentum of cart Y is 16 Kgm/s
Therefore, cart Y has a larger magnitude of momentum.
2. Determination of the reason why cart Y has a larger magnitude of momentum.
Momentum is simply defined as the product of mass and velocity i.e
Momentum = mass × velocity
Thus, an increase in either mass or velocity will increase the momentum.
Considering the question given and the solution obtained:
Cart A:
Mass (mₐ) = 2 Kg
Velocity (vₐ) = 4 m/s
Momentum of cart A (pₐ) = 8 Kgm/s
Cart Y:
Mass (mᵧ) = 8 Kg
Velocity (vᵧ) = 2 m/s
Momentum of cart Y (pᵧ) = 16 Kgm/s
From the above data, we can see that the mass of cart Y (i.e 8 Kg) is larger than the mass of cart A (i.e 2 Kg).
Thus, we can conclude that the magnitude of the momentum of cart Y is larger than that of cart A irrespective of their velocities because the mass of cart Y is larger than the mass of cart A.
Timed! i would really appreciate some help! will try to mark brainliest!!!
For her birthday, Samantha gets a new bike. She wants all her friends to see and so begins riding up and down her street. What is her speed if she goes 40.5m in 8.6s? *
4.71 m/s
4.71 h/m
47.1 h/m
Answer:
4.71m/s
Explanation:
Given parameters:
Distance covered = 40.5m
Time taken = 8.6s
Unknown:
Speed = ?
Solution:
The speed of Samantha is the distance divided by the time taken.
Speed = [tex]\frac{Distance}{time}[/tex]
Now insert the parameters;
Speed = [tex]\frac{40.5}{8.6}[/tex] = 4.71m/s
How many times can mechanical energy become chemical energy
Answer:
Chemical energy, Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat; such reactions are called exothermic.
Answer: infinite number of times
Explanation:
What is the range of an arrow shot horizontally at 85.3 m/s if it is initially 1.50 m above the ground?
range of arrow =
Answer:
47.2m
Explanation:
14. If we change how fast an object is going and change its mass then we
have changed its...
Answer:
Momentum
Explanation:
If we change how fast an object is going and change its mass, then we have changed its momentum.
The momentum of body is the quantity of motion such a body can possess.
It is mathematically expressed as:
Momentum = mass x velocity
Therefore, if we vary mass and velocity or either of them, then, the momentum of the object will also change.
Mass and velocity is very crucial to the momentum of a body.
Which characteristics best distinguish one landscape region from another? A. Human population density and types of environmental pollutants B. Composition of bedrock and variety of fossils C. Bedrock structure and evolution of land surfaces D. Stream gradients and soil types
Answer: C. Bedrock structure and evolution of land surfaces.
Explanation:
Landscape has to do with the visible features of a particular area of land, and its landforms, and their integration with the both the man-made features and the natural features.
The characteristics best distinguish one landscape region from another include the bedrock structure and evolution of land surfaces.
A young boy is dragging his 10 kg stuffed animal by the tail at a constant velocity of 4 m/s. The coefficient of friction between the dog and the ground is 0.4.
Answer:
if you multiply the coefficient to the denominator you will find that the percentage of increase is equal to your ending point
Explanation:
The ocean’s tides are not only affected by the shape of the coastlines, or slope of the ocean floor, but also by the gravitational tug of the Sun and the Moon. Write a 600 word report on the effect of the Moon, and Sun, on tidal reaction, and high tides and low tides. What orientation are the Sun and Moon in to create high tides? Low tides? There are two special types of tides. What are they called and what positions are the Sun and the Moon in during these times?
Answer:
a) According to Newton's law of gravitation, as the distance between the Moon and the Earth decreases, the gravitational attraction increases and vice versa
The gravitational force of the Moon on the Earth causes the Earth to be slightly bulged on the side directly facing the Moon
The gravitational force also pulls the water bodies on the Earth's surface towards the Moon in the same manner and the effect is more pronounced due to the ability of the liquid water to assume a shape based on the magnitude of the gravitational field attracting it
Therefore, the region where the Moon is closest to the Earth we have a high tide as the water level rises and the region which is perpendicular to where the Moon is located has a low tide
b) The two special types of tides are
1) The neap tide
2) The spring tide
Neap tide
Neap tide occurs when the Sun and Moon are 90° apart from each other when they are viewed by an observer from Earth
The gravitational pull of the Sun cancels (partially) the effect of the gravitational pull and tidal force of the Moon, resulting in minimum tidal range
Spring Tide
Spring tide occurs when the Earth, the Moon, and the Sun are simultaneously inline, such that the Sun reinforces the gravitational pull and tidal force of the Moon, resulting in a maximum tidal range
Explanation:
Answer:a
Explanation:
if a 5000-kg is moving at a speed of 43 m/s, what is its momentum?
Answer:
215000kgm/s
Explanation:
Given parameters:
Mass of the moving body = 5000kg
Velocity = 43m/s
Unknown:
Momentum = ?
Solution:
The momentum of a body is the amount of motion a body possess.
It is mathematically expressed as:
Momentum = mass x velocity
Now:
Momentum = 5000 x 43 = 215000kgm/s
A police officer is using her radar to check speeds. She is moving south at 50 mph. You are moving
north at 70 mph. What does her relative speed appear to be to you?
Answer:
the relative speed should be 40mph
Explanation:
1. Explain how you calculate the net force in any direction on the box.
2. Suppose an upward force of 15 N is added to the box. What will be the net vertical force on the box?
3. What force could be applied to the box to make the net force in the horizontal direction zero? Explain.
4. Suppose a force of 25 N to the right is added to the box. What will be the net force to the right?
1.Explain how you calculate the net force in any direction on the box.
If the two horizantal (left to right) forces act on an object in opposite directions and they don't exactly cancel out, what is left over is the net force In the diagram, the net force is 50 Newtons.
The equation you have to do (100 N - 50 N = 50 N).
If the two vertical (up and down) forces act on an object in opposite directions and they do cancel out, what is left over is the net force In the diagram, the net force is 0 Newtons. The equation you have to do. (25 N - 25 N = 0 N)
Final Answer: 50 N
2.Suppose an upward force of 15 N is added to the box. What will be the net vertical force on the box?
The net vertical force ( up and down) would be 15 N
3.What force could be applied to the box to make the net force in the horizontal direction zero? Explain.
You could apply another horizontal (left to right) force of 50 N then the horizontal net force would be 0 N
4.Suppose a force of 25 N to the right is added to the box. What will be the net force to the right?
If suppose I say I added a horizontal (left to right) net force of 25 right next to the 50 N. The net force for the whole box would be 25 N.
1. The net force in any direction is calculated by calculating the net horizontal force and the net vertical force on the box.
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
The mathematical expression for Newton's second law is as follows
F = ma
2. If an upward force of 15 N is added to the box, then the net vertical force on the box would be 15 N in the upward direction because earlier the net vertical force on the box was 0 N.
3. A force of 50 N to the right could be applied to the box to make the net force in the horizontal direction zero.
4. If a force of 25 N to the right is added to the box then the net force o the right would be 75 N.
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Is Muscle a group of cells that contract when stimulated?
Answer:
No.
Explanation:
Which statement best explains the speed of light waves as they travel from gas to solid?
Light waves do not travel through any solids.
Light waves speed up as they travel from gas to solid.
Light waves slow down as they travel from gas to solid.
Light waves continue to travel at the same speed as they travel from gas to solid.
Answer:
Light waves slow down as they travel from gas to solid.
Explanation:
The speed of light is often quoted with reference to a vacuum. Light travels fastest in a vacuum and in a gas.
When light travels through other media such as solids or liquids, the speed of light is decreased due to absorption and scattering of photons by molecules as well as remissions.
Hence the speed of light decreases from gas to solid.
What is nuclear fission?
Answer:
a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
Explanation:
i hope it's helpful
Answer:
The splitting of a nucleus
Explanation:
It is a correct answer for ap e x, hope it helps! :)
A ferris wheel with radius r rotates freely about its central
point with initial angular speed wi. A cart on the end
moves at linear speed 2v.
Suddenly, the ride deaccelerates so the cart moves with
speed v. The final angular speed is Of.
How does the angular speed of the ferris wheel
change?
Choose 1 answer:
Answer:
decreases by 2
Explanation:
The angular speed of the ferris wheel decreased by a factor of 2.
Angular speedThe angular speed of an object is the rate of change of angular displacement with time.
Relationship between angular speed and linear speedv = ωr
[tex]r = \frac{\omega }{v} \\\\\frac{\omega_1 }{v_1} = \frac{\omega_2 }{v_2} \\\\\omega_2 = \frac{\omega _1 v_2}{v_1} \\\\\omega _2 = \frac{\omega _i \times v}{2v} \\\\\omega _2 = \frac{1}{2} (\omega _1)[/tex]
Thus, the angular speed of the ferris wheel decreased by a factor of 2.
Learn more about angular speed here: https://brainly.com/question/6860269
Which part of the ocean is deepest?
Answer:
The oceans' deepest area is the Mariana Trench, also called the Marianas Trench, which is in the western part of the Pacific Ocean. The trench is 1,554 miles long and 44 miles wide, or 120 times larger than the Grand Canyon. According to the National Oceanic and Atmospheric Administration, the trench is almost 5 times wider than it is deep.
Explanation:
change 200km/hr into m/sec
Answer:
200km/hr=55.55m/sec
Explanation:
200km/1hr×1000m/1km×1hr/3600sec=200,000/36000
A car travels along a straight road, heading east for 1 h, then traveling for 30 min on another road that leads northeast. If the car has maintained a constant speed of 52 mi/h, how far is it from its starting position
Answer:
The car is 72.75 miles away from its starting position.
Explanation:
First, remember the relation:
distance = time*speed.
Also, the distance between two points (a, b) and (c, d) is:
D = √( (a - c)^2 + (b - d)^2)
For this problem, we can assume:
The North is equivalent to the y-axis, and the East is equivalent to the x-axis.
We also assume that the initial position of the car is (0mi, 0mi)
Now the car moves to the East at a speed of 52mi/h for one hour, then the new position of the car is:
(0mi, 0mi) + (52mi/h*1h, 0mi) = (52mi, 0mi)
Now the car travels 30 mins (or 0.5 hours) to the northeast at a speed of 52mi/h.
We can assume that it moves at an exact angle of 45° from East to North, then the components of the speed can be written as:
Sx = speed in the x-axis = 52mi/h*cos(45°) = 36.77 mi/h
Sy = speed in the y-axis = 52mi/h*sin(45°) = 36.77 mi/h
Then the new position of the car is:
(52mi, 0mi) + (36.77 mi/h*0.5h, 36.77 mi/h*0.5h) = (70.385 mi, 18.385 mi)
Now we know the final position of the car.
The distance between the final position (70.385 mi, 18.385 mi) and the initial position (0mi, 0mi) is:
D = √( (70.385 mi - 0mi)^2 + (18.385 mi - 0mi)^2) = 72.75 mi
The car is 72.75 miles away from its starting position.
